---
title: "Fade In"
description: "Local-first visual environment for building and running AI workflows. Build agents visually, deploy anywhere, privacy by design."
canonical: https://docs.nodetool.ai/nodes/nodetool/audio/fadein
markdown: https://docs.nodetool.ai/nodes/nodetool/audio/fadein.md
product: NodeTool
source: https://github.com/nodetool-ai/nodetool/blob/main/docs/nodes/nodetool/audio/fadein.md
---

# Fade In

**Type:** `nodetool.audio.FadeIn`

**Namespace:** `nodetool.audio`

## Description

Applies a fade-in effect to the beginning of an audio file.
    audio, edit, transition

## Properties

| Property | Type | Description | Default |
|----------|------|-------------|---------|
| audio | `audio` | The audio file to apply fade-in to. | `{"type":"audio","uri":"","asset_id":null,"data"...` |
| duration | `float` | Duration of the fade-in effect in seconds. | `1` |

## Outputs

| Output | Type | Description |
|--------|------|-------------|
| output | `audio` |  |

## Related Nodes

Browse other nodes in the [nodetool.audio](./) namespace.